A Pre 500™
  • High gain mic and instrument preamp
  • 26dB pad, phase reverse, 75Hz HPF, phantom power
  • 20 segment LED meter
  • CineMag input transformer for crystal clear sound
  • Balanced output with Jensen transformer

The A Pre 500 mic pre is inspired by the popular Aphex 188 eight-channel preamp, which uses a custom CineMag designed input transformer. The A PRE 500 then adds a Jensen JT-11DL nickel output balancing transformer and a custom CineMag input transformer.

  • Front panel 10Mohm, ¼” input for the connection of instruments like guitar and bass. This input overrides the input on the rear of the receiving frame when connected
  • A 3-way switch allows the selection of +16, +20 or +24dBu output levels
  • The 20-segment input meter allows input levels to be easily seen, even from a distance
  • 65dB of gain to properly operate dynamic, condenser, and ribbon microphones and a 26dB pad for very loud sources
  • Illuminated buttons control phantom power, phase reverse, and 75Hz high pass filter
  • PAR
    Pro Audio Review "Studio Review," October 2013


Live Performance - It’s becoming more and more common for live sound engineers to use outboard mic preamps on specific sources like lead vocals, acoustic guitars, snare drums, and such – especially for those engineers who have to use a different PA system every night. This allows them to keep a consistent sound for their featured instruments.

Professional Studio Recording - The A Pre 500 has a very neutral, yet bright character. It sounds especially good on drums and percussion, B3 organs, electric pianos, and acoustic guitars. Its ¼” input makes it easy to run instruments through the mic pre without using a direct box.

The A Pre 500 is approved by the VPR Alliance.

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Type Aphex custom CineMag transformer, instrumentation second stage
Impedance 1300 ohm nominal
Instrument Impedance 10M ohm nominal
CMRR >90dB @ 60Hz
Gain Range +30dB to +70dB (no pad, +24 level)
Pad 26dB
Max Input Level -3dBu (no pad), +23dBu (pad)
Low Cut 2nd order, -3dB @ 75Hz
Type Transformer balanced, Jensen JT-11-DL
Nominal Level +4dBu
Maximum Level (Meter 0dB) +24/+20/+16 dBu switchable
Impedance 100 ohm nominal
THD <0.003% @ +4dBu out
Frequency Response +/-1 dB <10Hz to 100kHz
EIN -125dBu @ max gain
Current draw 75mA

All specifications are subject to change without notice.

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Owner's Manual

A Pre 500 Owner's Manual

Promo Materials (click to download PDF)

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